The Piranah Water 3000
Radio
During World War I, the primary instrument used to detect the sound of submarines was the hydrophone. This underwater listening device allowed ships to detect the noises made by submarines, such as engine sounds and propeller movements. Hydrophones were often deployed in arrays and played a crucial role in anti-submarine warfare, helping to locate and track enemy submarines.
Radar : radio detection and ranging .
In Britain, ASDIC.In America SONAR.Different names for the same thing!
The "u" stood for "underwater" and the term "u-boats" was and still is used in reference to WWI German submarines.
sonar is a device for detecting objects underwater by emitting sound waves and analyzing the echoes that bounce back. It is commonly used in navigation, fishing, and underwater mapping.
Underwater sound detecting systems are called hydrophones. These devices are used to listen to and record sounds underwater, such as those produced by marine animals or underwater activities.
It's called a "Motion Detector"!
A Passive InfraRed Sensor (PIR)
An underwater world seed for Minecraft is used to open an underwater world to play the game in.
A microphone detects sounds transmitted in the air.
Sonar is used in various applications, including underwater mapping, navigation, fish finding, underwater communication, and military purposes such as detecting submarines. It works by emitting sound waves and analyzing the echoes to determine the location, size, and composition of objects underwater.
A special type of radar called sonar is used to detect objects underwater by emitting sound waves and detecting their reflections. Sonar is commonly used in applications such as navigation, communication with submarines, and mapping the ocean floor.
A sonar device can detect objects underwater by emitting sound waves and analyzing the echoes that bounce back. It can be used to find underwater features such as fish, submarines, shipwrecks, or the seafloor.
A sonar cannon is a tool that is used to create a noise that is painful to crowds of people or even to animals. These cannons are sometimes also used to explore for oil under the ground by bouncing sound waves off of bedrock seeking holes in the rock.
This sounds like it's probably the sonar system of a submarine.
sonar is a device used underwater for locating submerged objects and for submarine communication by means of sound waves.